extract the spectra along a given direction
if given a dag file extract the scpectra in the windward direction
use the new version of Hspectra to get 1-D windward spectra
change argument order

Since a default width is a function of the filter order the width should
be specified after the order
add missing semi-colons, use gnuplot stats to set colorbar
allow for maxcolrs ato be set (changes inputs)